The National Party has been forced to apologise to potentially thousands of people after accidentally signing them up to the party database.
People who signed up to join two petitions - against scrapping flights to Kāpiti Airport and one to save the Lumsden Maternity Centre in Southland - started also receiving emails from National asking for money to fight the government.
National would not say how many people were added to their database, but thousands signed the two petitions started by National MPs.
Neither petition stated that an email address would be added to the party's mailing list.
Joanne Dacombe, who signed the Kāpiti petition, says she felt her privacy had been breached.
"They risk alienating the very base they're trying to attract. It's a very unfortunate state of affairs for them.
"I think they were just a bit opportunist and thought 'that's it, we'll tap into this'."
Joanne is now hesitant to sign any more National sponsored petitions in the future.
"Fair enough that I signed the petition, but I didn't sign up to receive National Party emails."
Joanne wasn't the only one upset - many people expressed their disappointment online.
"Not impressed. I signed the petition to support a local project, not for my email address to be used for another political purpose," one person wrote.
Another woman says she "was seriously disgusted, & felt seriously insulted, when I received the begging letter from Simon Bridges".
Another person says the petition was "just a way to collect data to bombard your inbox with National Party propaganda".
The National Party says once it started receiving the complaints it realised email addresses had been mistakenly added to the database.
"We have since gone back to each individual concerned, apologised for the error, and removed them from the main email list," says a spokesperson.
"This is, and will always be, about championing local issues that matter to New Zealanders."
Political parties have been using different tactics for years to try and get people on to their email databases.
Two years ago, Labour had to defend its use of a "baby number" widget which offered people the chance to find out what number baby they are, in exchange for giving the party their email address.